diff --git a/requirements.txt b/requirements.txt
index cc778d8..55c066c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ jupyter
 pytest>=3.2.2
 docopt
 pyyaml
-protobuf==3.6.1
+protobuf==3.18.3
 grpcio==1.11.0
 torch==0.4.1
 pandas